US 20060020308 A1
This device incorporates an array of light emitting diodes (LED) of several specific wavelengths that are used to provide therapy to visible and invisible living tissue or skin disorders that react to various wavelengths of light. Furthermore the device uses a combination of high level of perforation metal core circuit boards, heat transfer pads, heat sinks and forced air cooling and electronic thermal management to achieve continuous high intensity light output to therapy areas along with long LED life. The invention is using replaceable LED modules enabling device maintenance by user operators not trained as maintenance technicians.
1. A light therapy device, having replaceable multiple LED array modules used in therapy of visible and invisible skin or tissue disorders that react to various wavelengths of light and providing increased light output per unit area, thus reducing therapy time.
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1. Field of Invention
This invention relates generally to the field of medical living tissue using light therapy in and more specifically to improvement of light devices used in therapy of visible and invisible skin disorders that react to various wavelengths of light.
2. Prior Art
Diamantopolus1, et al. in U.S. Pat. No. 4,930,504 (Jun. 5, 1990) and other references teach us that certain wavelengths of light ranging from 600 nm thru 1500 nm are effective in biostimulation of tissue. For many years, high-powered highly focused lasers have been used to cut and destroy tissues in many surgical techniques. More recently, low powered lasers, less sharply focused, which do not cut or destroy tissues have been found to, or thought to, affect numerous metabolic processes, including cell division, cyclic-AMP metabolism, oxidative phosphoration, hemoglobin, collages and other protein synthesis, leukocyte activity, tumor growth, production of macrophage cells, and wound healing. Read, for example, Harry T. Whelan2 et al. “Medical Applications of Space Light-Emitting Diode Technology-Space Station and Beyond”, 15 pages, CP458 Space Technology and Applications International Forum-1999; Harry T. Whelan3 et al. Effect of NASA Light-Emitting Diode Irradiation on Wound Healing. Journal of Clinical Laser Medicine and Surgery, vol 19, Nov. 6, 2001; Mary Ann Liebert4, Inc pp 305-314. “LEDs Illuminate the Future of Light Based Skin Rejuvenation” American Society for Dermatological Surgery, Apr. 10, 2003—Schamburg, Ill.
McDaniel5, in U.S. Pat. No. 6,663,659 (Dec. 16, 2003), discusses LED light therapy technology without addressing the servicing and heat management of the present invention. Pecukonis6, in U.S. Pat. No. 6,471,716 (Jun. 11, 2002), addresses living tissue therapy in the infrared light spectrum and does not address problems concerning LED array replacement or heat control problems without light pulsing
There is a need for LED arrays to be able to concentrate more light in a given area to reduce tissue treatment times, concentrate the focus of light on controlled areas, reduce the cost and weight of the devise, improve LED life, and reduce the maintenance cost and down time when an LED burns out or other light source malfunctions. The limitation to increasing light output for a given area has been the overheating of the LED and other components causing short component life. Further heat management avoids difficult to handle and often unacceptable current fluctuations in LED arrays, Ito,7 et al. in U.S. Pat. No. 4,720,480 (Jan. 19, 1988), suggests materials are available that enable rapid heat transfer of heat from one surface to another with very little heat retained from the transfer. Lev8, in U.S. Pat. No. 6,301,107 (Oct. 9, 20001), states thermosyphoning pipes incorporated into computer heat generating devices can be effective in enhancing heat removal.
Hsu9, in U.S. Pat. No. 6,705,393 (Mar. 16, 2004), shows ceramic heat sinks having a micro-pore structure can greatly enhance heat dissipation. Bolognia10, et al in U.S. Pat. No. 6,373,696 (Apr. 2, 2002), says thermal transfer pads improve the efficiency of heat transfer. Hochstein11 et al, in U.S. Pat. No. 6,582,100 (Jun. 24, 2003), explains very well the advantages and limitations of various methods of assembling LED mounting systems. Also, there is a need for the device operator to be able to select various wavelengths of light for the patient without having to move the device or change light arrays. In addition, there is a need for the device operator, not trained as an maintenance technician, to be able to replace a failed LED array.
The primary object of the invention is achieving higher light energy outputs per unit area with minimum LED life of 5000 hours by using highly perforated metal core circuit boards as an essential part of a heat management system.
Further objects of the invention include:
1. Higher light intensity, to a given area thus reducing treatment time, by using metal core circuit board heat management.
2. Improving light therapy devices by lowering operating costs by enabling user/operator maintenance.
3. Using “blue light” wavelength, optimized for acne vulgaris with over 2800 LED devices operating in the 400 to 500 nm range
4. Using “red light” wavelength which can be selected for wound healing and operating in the 600 to 880 nm range.
5. Using combinations of above which can be operator selected to optimize treatment times and effectiveness.
6. Extending LED life utilizing improved heat management.
7. Utilizing user replaceable plug-in LED modules to enable device repair by non-maintenance technicians.
8. Enabling lower maintenance costs utilizing improved heat management.
9. Simplifying design to enable improved economic benefits.
10. Improving dependability in technology of LED array modules by use of this device and it's associated heat management design.
11. Qualifying the invention so the FDA will accept the device as a LED light therapy device with nonsignificant risk.
Other objects and advantages of the present invention will become apparent from the following descriptions, taken in connection with the accompanying drawings, wherein, by way of illustration and example, an embodiment of the present invention is disclosed.
The drawings constitute a part of this specification and include exemplary embodiments to the invention, which may be embodied in various forms. It is to be understood that in some instances various aspects of the invention may be shown exaggerated or enlarged to facilitate an understanding of the invention.
Detailed descriptions of the preferred embodiment are provided herein. It is to be understood, however, that the present invention may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but rather as a basis for the claims and as a representative basis for teaching one skilled in the art to employ the present invention in virtually any appropriately detailed system, structure, or manner.
While the invention has been described in connection with a preferred embodiment, it is not intended to limit the scope of the invention to the particular form set forth, but on the contrary, it is intended to cover such alternatives, modifications, and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.